Fluorine → Trifluoromethanesulfonic anhydride

Participants

Reaction Steps

Then, the first distillation of Example 1 was repeated, thereby to obtain 121 kg of trifluoromethanesulfonic acid anhydride which is colorless and transparent. By chemical analysis, this first distillate was found to have a purity of 93 wt % and contain 5 wt % of trifluoromethanesulfonic acid ester, 2 wt % of trifluoromethanesulfonic acid, 50 wt ppm of phosphorus, and 600 wt ppm of free fluorine. The amount of trifluoromethanesulfonic acid anhydride produced by the reaction was 112.5 kg, and the yield was 59.8%, based on the amount of trifluoromethanesulfonic acid.

Provenance & Evidence